package cn.itsource.celljava.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;
import java.util.concurrent.TimeUnit;
@Component
public class LoginInterceptor implements HandlerInterceptor {
    @Autowired
    private RedisTemplate redisTemplate;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String token = request.getHeader("token");
        if (token!=null){
            //登录是否过期
            Object o = redisTemplate.opsForValue().get(token);
            if (o!=null){
                //重置时间
                redisTemplate.opsForValue().set(token,o,30, TimeUnit.MINUTES);
                return true;
            }
        }
        //都是登录是吧返回一个错误 {“success”:false,"message":"noLogin"}，让前端条页面
        response.setCharacterEncoding("utf-8");
        response.setContentType("application/json; charset=UTF-8");
        PrintWriter writer = response.getWriter();
        // 在外面写好在拷贝进去
        writer.write("{\"flag\":false,\"msg\":\"noLogin\"}");
        writer.close();
        return false;
    }
}
